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Synthesis and Activities of Rutile IrO2 and RuO2 Nanoparticles for Oxygen Evolution in Acid and Alkaline Solutions

Lee, Youngmin, Suntivich, Jin, May, Kevin J., Perry, Erin E., Shao-Horn, Yang·2012·The Journal of Physical Chemistry Letters
DOI 10.1021/jz2016507
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Abstract

The activities of the oxygen evolution reaction (OER) on iridium-oxide- and ruthenium-oxide-based catalysts are among the highest known to date. However, the OER activities of thermodynamically stable rutile iridium oxide (r-IrO2) and rutile iridium oxide (r-RuO2), normalized to catalyst mass or true surface area are not well-defined. Here we report a synthesis of r-IrO2 and r-RuO2 nanoparticles (NPs) of ∼6 nm, and examine their OER activities in acid and alkaline solutions. Both r-IrO2 and r-RuO2 NPs were highly active for OER, with r-RuO2 exhibiting up to 10 A/goxide at 1.48 V versus reversible hydrogen electrode. When comparing the two, r-RuO2 NPs were found to have slightly higher intrinsic and mass OER activities than r-IrO2 in both acid and basic solutions. Interestingly, these oxide NPs showed higher stability under OER conditions than commercial Ru/C and Ir/C catalysts. Our study shows that these r-RuO2 and r-IrO2 NPs can serve as a benchmark in the development of active OER catalysts for electrolyzers, metal-air batteries, and photoelectrochemical water splitting applications.

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Metadata

Authors
Lee, Y., Suntivich, J., May, K. J., Perry, E. E., & Shao-Horn, Y.
Venue
The Journal of Physical Chemistry Letters
Publisher
American Chemical Society (ACS)
Published
2012-01-19
Volume
3
Issue
3
Pages
399-404
ISSN
1948-7185 (ISSN-L)
DOI
10.1021/jz2016507
OpenAlex
W2015124676
Cited by
3,534
References
2
FWCI
33.41
Type
journal article
Language
en
Open access
closed

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